And I discovered that weather.com also has Kingston records, much closer
than Knoxville.

Escondido's summer nighttime low temperatures are almost identical to
Kingston's, so anything blooming in there in August might be capable of
blooming here in August/Sept <if> everything else were suitable <and>
the average temperatures are close enough to what's happening now.

I was able to get some seeds from IMMORTALITY X LULLABY OF SPRING this
year, the only one from his list of July/August bloomers that
cooperated. Ought to be a bunch of really ugly seedlings, but will
probably plant them just to see if they can rebloom here.